Level



Sept. 421 1926.

, R. T. STEVENS LEVEL Filed oct.. 2o, 192:5

unina! ROY fr. srnvniis,'won Mccooir, NEBRASKA'. if? I i This'` invention relates` to improvements levelsA of the type inv which the'ldegree of,Y inlY -clin'atioii is" determined by fmeans of a' peri'-wv dulum, instead ofE by the usual ar'cuatejtube containing spirits. i

It'is-voften'desirablefi-.to be able to determiiie't'he degree-of inclination of a surface as well as to determine whether or not the surface is level. Vith the ordinary spirit level no means are7 as a rule7 provided for any comparing the. inclinations of different' sides of a roof, etc.

I attain theabove objects by means of aV construction and arrangement of parts which I will now describe in detail, reference for this purpose being had to the accoinpanying drawing in which the preferred einbodiment of my invention is shown andV in which: I

Fig. l is a side elevation of my improved level, parts thereof being broken away so ,as yto more clearly disclose the construction;

Fig. 2 is a section taken on line 2--2, Fig. 1, and 0 Fig. 3 is a side elevation of the .pendulum showing the scale whichv is applied vto the outer surface thereof.

My level comprises a rectangular body member 1 of wood or metal. This member may have a rectangular cross section and has the two opposite edges 2 and 3 as nearlyl parallel as possible. -At appoint substantially centrally of the body member 1, I provide an elongated opening 4. The sides .of this opening have opposite arcuate portions 5 which are concentric and have the s ame radius. My inclinometer mechanism, which will now be described, is secured in place between the arcuate sides V5 by means which will be hereinafter described. The inclinometer mechanism comprises a cylindrical section 6 of glass or other .transparent material whose outside diameter equals the diametrical distance between the arcuate surfaces 5 and is removably clamped in place by means of screws 7. vIIhe'ei'ids of ber6, areV Closed 'zircfz'iilar5, di's'lsfrA annular flanges 9' that fit against the inner surface of the transparenty vcylinder 6'. Q ,The

,Y disks 8 `are held',against'thecyliiiderl aends-by ingang-@f1 al p'ltifaiay, if boltsgio; .The disks safe each provided/at theitlic'eatfs"with screws ll'which are threadedly secured to the disks so that they may be adjusted'for a purpose that will hereinafter presently appear. Ihe inner ends of the screws 11 have conical openings for the reception of the conical end s of the shaft 12which are journaled in said openings. Secured to theshaft l2 is a dish-shaped pendulum having a cy lindrical flange or wall land an inwardly j.

projecting conical bottom 14. The pendu'.V

lum is preferably pressed Vfrom someV light sheet metal, such as, aluminum and has a weight 15 securedto one side. This weight lmust be of'sucient value to hold the pendulum against rotation and .to maintain it A in such a position thata vertical line passing v through the lcenterof gravityof the weightf The o uter surface of the cylindrical wall 13 of the pendulum is graduated and dividedr into seventy-two equalspaces, each of which represents five degrees. Thesegraduations are divided into four equal sections or quadrants, each comprising ninety degrees and each section is numbered vin opposite directions from O to 90. VThe ring 6 has two sets a free movement of the pendulum.v IVhen great accuracy is required jeweled bearings, like those used'in watches, may be employed. Plates 18 are embedded in the sides of the member 1 in the manner shown.

I desire; to call particular attention vto the construction of the inclinometer device which vis so made that it forms anindependent aswill also intersect the axis of the shaft 12.

sembly which can be fully assembled and adjusted before vit is put into place. The trans-4 parent cylindrical ring 6, together with the flanged disks 8 form la housing forthe penduluin. The conical bottom 14 ofthe pendulum makes the latter rigid and makes it i possible to use very thin light metal in its construction. .The adjustable cone bearings comprising lthe screws 1l make it possible to obtain a very delicate adjustment. t

From the above it'V Will be apparent that I have produced a level vof very simple con- 'struction that can be used for many purposes for which a spirit level of ordinary construction is unsuited and which is adapted for the most accurate Work. y

Having now Vdescribed'my invention, What I claim as new is:V i

/An A inclinometer device comprising, .inV

combination, a cylindrical member of transparent material, end closures for said member, said closures consisting of circular disks having an annular flange extending from one side, said flange being adapted to project into said cylindrical member and to serve as positioning means, means connecting said end closures so as to hold the latter Y* against the ends of the cylindrical member, adjustable bearing memberswsecured to the end closures at the center point of each Vclosure, a shaft rotatably mounted'in said bear- Y ROY T. Sritviens.l 

